76013521 has 2 divisors, whose sum is σ = 76013522. Its totient is φ = 76013520.

The previous prime is 76013489. The next prime is 76013543. The reversal of 76013521 is 12531067.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38937600 + 37075921 = 6240^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 76013521 - 2⁵ = 76013489 is a prime.

It is not a weakly prime, because it can be changed into another prime (76013621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38006760 + 38006761.

It is an arithmetic number, because the mean of its divisors is an integer number (38006761).

Almost surely, 2^76013521 is an apocalyptic number.

It is an amenable number.

76013521 is a deficient number, since it is larger than the sum of its proper divisors (1).

76013521 is an equidigital number, since it uses as much as digits as its factorization.

76013521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 76013521 is about 8718.5733351277. The cubic root of 76013521 is about 423.6074764845.

Adding to 76013521 its reverse (12531067), we get a palindrome (88544588).

The spelling of 76013521 in words is "seventy-six million, thirteen thousand, five hundred twenty-one".